removed timeouts on http_client when uploading.

As per recommendations at https://github.com/nahi/httpclient, have set the send_timeout and receive_timeout to 0 when uploading large files:

LIMITATION:
          timeout occurs certainly when you send very large file and
          @send_timeout is default since HTTPClient::Session#query() assumes
          that *all* write are finished in @send_timeout sec not each write.
    
        WORKAROUND:
          increment @send_timeout and @receive_timeout or set @send_timeout and
          @receive_timeout to 0 not to be timeout.
Merge pull request #85 from rojotek/patch-1

removed timeouts on http_client when uploading.